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ORA-12154: TNS:could not resolve the connect identifier specified

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Hi all, I need your help.

I have this error in the oracle connection with OLEDB:

ORA-12154: TNS:could not resolve the connect identifier specified

Connection string:
cn.Open "Provider=OraOLEDB.Oracle;Data Source=C800FSI1_2;UserId=DIP;Password=XXXXXX;"
Listener.ora
# listener.ora Network Configuration File: C:\app\Administrator\product\11.2.0\dbhome_2\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\app\Administrator\product\11.2.0\dbhome_2)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:C:\app\Administrator\product\11.2.0\dbhome_2\bin\oraclr11.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = C800FSI1)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = C:\app\Administrator
sqlnet.ora
# sqlnet.ora Network Configuration File: C:\app\Administrator\product\11.2.0\dbhome_2\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to 
# install "Software Only", this file wont exist and without the native 
# authentication, they will not be able to connect to the database on NT.

NAMES.DEFAULT_DOMAIN = C800FSI1
SQLNET.AUTHENTICATION_SERVICES = (none)
SQLNET.AUTHENTICATION = (none)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
TnsNames.ora
# tnsnames.ora Network Configuration File: C:\app\Administrator\product\11.2.0\dbhome_2\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

C800FSI1_2 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = C800FSI1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = C800FSI1_2)
    )
  )

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

C800FSI1 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = C800FSI1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = C800FSI1)
    )
  )

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = C800FSI1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )
Can you help me?

Edited by: user6317803 on 26-gen-2011 13.13

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